Function ImFileLoadToMemory

KBotExt/imgui/imgui.cpp:2043–2080

Helper: Load file content into memory Memory allocated with IM_ALLOC(), must be freed by user using IM_FREE() == ImGui::MemFree() This can't really be used with "rt" because fseek size won't match read size.

// Memory allocated with IM_ALLOC(), must be freed by user using IM_FREE() == ImGui::MemFree()
// This can't really be used with "rt" because fseek size won't match read size.
void* ImFileLoadToMemory(const char* filename, const char* mode, size_t* out_file_size, int padding_bytes)
{
	IM_ASSERT(filename && mode);
	if (out_file_size)
		*out_file_size = 0;

	ImFileHandle f;
	if ((f = ImFileOpen(filename, mode)) == NULL)
		return NULL;

	size_t file_size = (size_t)ImFileGetSize(f);
	if (file_size == (size_t)-1)
	{
		ImFileClose(f);
		return NULL;
	}

	void* file_data = IM_ALLOC(file_size + padding_bytes);
	if (file_data == NULL)
	{
		ImFileClose(f);
		return NULL;
	}
	if (ImFileRead(file_data, 1, file_size, f) != file_size)
	{
		ImFileClose(f);
		IM_FREE(file_data);
		return NULL;
	}
	if (padding_bytes > 0)
		memset((void*)(((char*)file_data) + file_size), 0, (size_t)padding_bytes);

	ImFileClose(f);
	if (out_file_size)
		*out_file_size = file_size;

	return file_data;
}

//-----------------------------------------------------------------------------
// [SECTION] MISC HELPERS/UTILITIES (ImText* functions)